Hey guys. Now that we have gotten some snow here, the past couple of days I've noticed my windshield and my door windows will accumulate condensation inside while it's parked there. Last time I drove it (close to a week ago) it was dry in there. Next day I see it built up and froze on the inside of the windows. How is this happening? I do have a rather large crack in the windshield that runs at least half the length of the glass, could this be the cause? All my door seals appear like new. I'm not excited about the idea of water dripping down the inside of the windshield and getting on electrical stuff. Any thoughts?

 

It could just be residual humidity in the cab. When it gets cold enough it'll condense on the windows. Does your AC work at all? Running defrost will run the AC and remove moisture from the cab.

 

Ya the AC works, but I do notice the clutch kicks on and off quite often. It's done that for awhile so I checked the charge with the DIY kit with the Freon bottle and guage and it said it was at the proper charge. I've never had this happen to this truck in all the years I've had it. What you said sounds logical though

 

bumping this up...still having this problem. And still have the giant crack. The crack runs from the bottom middle of the glass, up to the middle of the windshield and then shoots straight over to the passenger edge of the window. Anybody think the crack can cause this? Im at a loss because I know it's dry in there when I park it.

 

You said you got snow now. Are you positive your floor boards or seats are damp from the snow and that's where you are getting the moisture from?

Probably a long shot, but your heater core isn't leaking is it?

 

we've gotten a trace of snow recently, and I haven't been in it to track any snow into it, or anything moisture wise in the past few weeks. This windshield was replaced years ago, maybe the seal has gone bad? I'm positive the floors were dry and that the heater core isn't leaking. This shouldn't be happening imho. I know all signs point to moisture in the cab but I just can't see any.

 

Feel around under the seat as well...... might be getting some water intrusion around the rear window seal, or the third brake lite.

 

And check for A/C condensate tracking back along the bottom of the drain, and through the firewall past the deteriorated seal... it will run down the inside of the firewall and pool underneath the carpet.
From the inside, pull the top of the carpet back a little and tuck your finger into the hole in the underlay where the condensate drain goes through the firewall, and see it the backing is damp.

 

I don't have a/c and my cab is definitely not sealed and have never had this problem. All that I can think of is maybe the weather conditions where you live cause it. I would maybe start by cleaning the windows good with some rain x wipes or something, and if that doesn't work rent or buy a fog machine to see where the seals are bad.

 

I have only had this problem once since I moved up to Wyoming and it only happened cause I stayed in my truck while on the phone after I shut it off. The only way I could think this could happen is if you have a hot liquid that evaporates off after you turn your truck off or, thinking to the refrigeration class I took recently, you could have cold, humid air flash when it goes through a bad seal or the crack in the windshield but you would have to have a pretty high pressure difference.